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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f63a8055c9c67c95698d34e76a3ac9de494ac4b59a43f21b35d2535c4af1ab33' 
  AND token = '+Toh0VUkdsaIlgWtQITFzVuFKpaRlWBwO0iwi7SYDNo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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