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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '482aff3e52701bbde9b93f0add8957616f3c4302d52183994a7788acb9d92091' 
  AND token = 'cojIyWsmlupuxEgTdbUnFGZXop63AUY84t4tECbJtW4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}