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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8a3597e69564b7a4f3c93a2caa4dd1bd17fb511ee8b3e4d46a5a1593d828c88d' 
  AND token = '9meZRDQ79LDLDFfWaKQ4AfMnUZphjQaUP6OU2PZWqlk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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