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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e80845b017280bb45cea0edc33802ac4fba0d2c3618b2bf69f0d35ece49db3b4' 
  AND token = 'jO4Aj4YMg5jlxWifRk11wIB3VDPYWa6aFD0Gdw6zRTs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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