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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '14380e5b3b7d029ceaaf22461ac739ce0fec81d755f5ddcd9f68adfccaf22853' 
  AND token = 'MnwNDPw1ncsvsxvM2tYkt/Pz7c8HwcHU2CvpmtHNQvY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00069

JSON explain

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