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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a2530f0a65677b08578dc75f7fecc3da4a174852b176ba41e9b7e3b2cb7015e4' 
  AND token = 'LNfy3MWwjkXArQUejDHAhoogaL1O5CitX3HF5HeAD1k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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