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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd077029d5b32c81c612fc5f61d43b6682298df192ff832528861398fdf3b9c06' 
  AND token = 'ctbCy4kkb3WPsBVaSDDqRfnnwO/S8KK2s4n9XEesSdc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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