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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '66c00f140e2779c7cbe5e88ca438be41c14b7fd264c6d13287f0b4bc72cea5fb' 
  AND token = 'JjBh7vFxyj/oYHYuJdjw4qFuOqc42O6repO0dDVlUJI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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