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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b5fcc2c82d474d4f0b0dcbb69553d6a73f7bd5b4ed74d0f433ac24b24750b5d7' 
  AND token = 'G3CvwH5Qbuz2cjXrIcxqiBPueFbQfi8oey292zdnbFg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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