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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e1af7e5069679c16b06f4430b8ac1a817cead7b8c0eeab918fb05060a853f435' 
  AND token = 'tmiG0wNHLvjPdUOdo/iJv0bjEVmu8imUfywU7U+Iyp4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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