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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8bb4935885cd4f253ee61fe8f26bdb650a6238e586b9d96320dcff695c039001' 
  AND token = 'hSZ87q931virkwic3ssO+aoUpwy27extf+DV7vcMqv4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00109

JSON explain

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