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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '20473cd93758a28bef421f20ed6bac62b93333b5db71aba4d955328eae5e9e73' 
  AND token = '2qxlbCWivB1Cp+VH6Qjb3FAA1d0Q/pHUiRDf8c+4yGQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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