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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07e270f25a1d02d1ac71911ef3fb1897eb33fc234a7173c359d74ee7410a99df' 
  AND token = '2X98qf6X4DkEYdXxJ8ypgukyIwozz312xBAXOLdqFPM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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