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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '1d277e4d864da300153dfef3609305c4ba61d0ecff5f119317ec93f6b73d611b' 
  AND token = '0c2CiN4q6toyq6/6PnGAFtEfy6xh+NiltT2+riZMWAU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}