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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fbf78d4576188c3c688a38b021043ce3561f4f9715a4e17f3da55f1d1956c8d6' 
  AND token = 'bs4e8tex/ykDA7oiIMu6lIW8idjjd9drs4CRg7IukFk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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