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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '24d3a06e206e71860c032222bfee98a508488c575b27b03a4f6e37113e405dde' 
  AND token = 'VBc1bbW6+BaUJ51BfNy/YG9iDIQcpfdysV3gIbVwbl0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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