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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'aa2063988bc0d15aba5ac2c352cfb0ce18fc2a8b4b1dc8ded6fae2c4107d543e' 
  AND token = '0QAFN8oEQFPIolhe5pOaorR+k2wVE8MCOSF4NMkpb/o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00008

JSON explain

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