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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eab9d91b2dc17952482c50d5192393a56b2db4d71bcef8dc0e5504bb2e55474b' 
  AND token = 'g1oAbue/iF98ydWg11pyndQR6/0sB0wdi9F+azs2NWY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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