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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'abbe7fe0dd286492dea0e19280f4f57e1000a2dd3024c8c0b4e81dcd779282fa' 
  AND token = '070GEE9gyfjdlTlya0OV4IAxrJBMTxLQYR7GDf19aUQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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