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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2d0aba6a0ccca8718a5ec4b9fd2db60b4c9fe01826563481495c63eea4b5d5a5' 
  AND token = '7dyshzv+pxwVc5Wbhd4Nk2Bmt8d4N0cvd8188O3vYWs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00080

JSON explain

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