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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '93098459f18f547aa45cf85af5d123d69064ced2dcca7ee2f6face8cb363bf4e' 
  AND token = '1AM5BNM7Naj1sX12A4EUKtnwtmdfTVolVxvbdklji60=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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