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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'a0985bddc00635a23966a3444bad9d54865e41934233670fa3d1afde22bbadc1' 
  AND token = 'cLQqwE6pEuIIy6D8q216Jf7ll3Y0cO8Tlr7RreR/G3E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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