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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a8a076e411a8ec7a1b5dacd0ed1e40ef1fa4d798058eae2d98c04bd90e6684be' 
  AND token = '8RUkZWgwT2MYdX7H2zRKqA8orQ53MIgoGRX39AyVA1U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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