Sandbox

SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '08ab218f9d38d872b11b19c2cbb354348ed6228cea5157de622dbd97f0f8abc3' 
  AND token = '6FfPSpAOcMrcaFiEiSu0M0ytL/aUZpNyTiwc79Qc+jg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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