Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '49ea20de50c40d36cfa51682633ec51e4e999e98f394e21f239f203d9032e244' 
  AND token = 'f2Zqt2p3xtL2HlJcFjOD3lV2Jl23s1uFEzEGP+I55Og=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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