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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '083670a60d816d405e2cf2860bd73deb83534f572de4ea4834e083fe8f1c4dc0' 
  AND token = 'eaipDOWRNdmBCp5ko8tm4BWN4Im15oNDNqrWiT3Nn+o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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