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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '012e2016735fd39e4e8c9c0281f0153e22de5c9f73732890c4e5b75dd61608b0' 
  AND token = 'u07XUh5uN8tP45UF/ZwGKHTMS33NDfBlLtXJxRX4Kek=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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