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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b95bdd3ddfd614fd1060c9d925aaec130b045378e3dd4e909925734da74d1cf8' 
  AND token = 'JUAEi7gpvvq3g8NBc2gXEWmd/udDNVHUBlF5eOZeb9g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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