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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '63c938cd325c9a38b37b3f80a50c11ad250f8fe39465c1949cf2b759b36fb491' 
  AND token = 'y9ef2ewBbsZHJ7QuS7bnDEcPzXgdM8Rc90vA8RAxyb8=' 
  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"
    }
  }
}