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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c2c53d9a0c46493647f2d873f5f303ec67538bdcfcabfb1765d9e39e05483805' 
  AND token = 'F4emmIXQBcBZCu8xKxXxce4UT7q6C8V02pZ9bhoEjwc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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