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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '724c3929d6bdc9fbeecf53cb3a156e2644dab57ad84bf1fb6796e7483cff2ea9' 
  AND token = 'uF4B90Viu9iaRT83C+LsXk8iv+dnmtedfL6eA7+jWzA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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