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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'df9bd98bf5cfcded34e1933a1f8c9bf359bfd0fffb1c85cb5bf2beaf83178b56' 
  AND token = 'kJwo1JlnWbrbpN9DZ6CGoDEL2lF+PhZH2ZuMX2DoORY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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