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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c0457c07eabc615c63af036442d06551c3d68c29c0592b3d548a1044a86109a1' 
  AND token = 'wVhhpFVrUhcOfDu4RBX3BSdBRdtI0X9bqP+dEKzE8Mw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00061

JSON explain

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