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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '73630bafddb9a9663514d874d5f6a0e09ed3c601452606fdf716805a8c5d857e' 
  AND token = '44Q848RhtNJLxM92pD5S0role4dh8GXFbIwGq1M9g5U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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