Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '62b2511b277774ca36dfb302a211a7f9d6b7d4b4bffee4b75cfaf82e279dc783' 
  AND token = 'gmFTqLcm54YbvoP4Q2azg7c4vHaid9gnmTNkW1E/BYg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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