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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7222adbd8f418298d75d669ed5f6d5d61a99b9074c094134f844777c7d510005' 
  AND token = '0q8bT24Fhe6j/RdqnAixsqAdW/NSV5Pk809knm4CQco=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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