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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5583cedd214a2c303a89c5941698b800cd0ccabe3f41f4bac564c9cc4adf1382' 
  AND token = 'OhUlLsFAiujgyxDmD+QVzYJzbHXNpScRPPnEX49C48c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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