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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '043f625a7b7058b026ebbdb8d807a1adc40b02620dcc17b885812ac9d8a978d6' 
  AND token = 'SHXU+HoPCi5Pj4p+R3dvVmVp5AnXyACw2UVM3stm2C0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}