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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '890abf635d500282086c52b21f4c56c24d6dd4314182966c50b0fe3e1124b951' 
  AND token = 'VVfDUlbZRHoaHAXXnLcAQ6s1OmSpQZsr0Cecfe46dIs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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