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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7f005c22484f298d0036888673100d4b98bff968f79a77d69129e815d9f0c912' 
  AND token = 'UtYiRKruzYGssy2KufXnlWuAWmO/bOEUj/XNIL7dzPE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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