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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07f6f26bd3b10cc70d4dd2f5011b1debdf6b8a177919ea8edc1eafecebf38087' 
  AND token = 'uzkPWOweUjLXnXWS9MpMX6KUXLLFSozrI7O8n/PsUYE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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