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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95aedf3c599b5e1a7260686642cf95a120868d8a0ecff23ffd23fedf43252da5' 
  AND token = '+I3vGpEUyDvnfv2SJ/WJf3TIth89Za0bdlJOnMr8pwU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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