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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a826e5b34bd94b93145b66521c85995c40c798a6727a044c05aa5b8e092dfe8b' 
  AND token = 'tfsglPtAKq1q1yjeTGTqkwa6y4nyRXS+S4zaj5G5qtA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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