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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '63b694cf2875351b40800bc00b930d28cc3b5e1335bd4468222de97f1bc196c5' 
  AND token = 'yvw/yygzQq/2tDwu4k2fWk6Fje3IgtUfsiKfrLiOdvA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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