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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '60d433f992d08d54ee7ff7c402708f43084ef33ee80f7e42f862e63c50650cd1' 
  AND token = 'B45pKb3R0BSel75raxFLhF4wSg/0GwpLRGqAd7TFYdo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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