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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7e3e62ca30f82cfa7b91c08448a0fed22f4eea7fbe83fb42131d415d11b5c4bf' 
  AND token = 'SAaOEY19AkRvHQValHTTxQ/N4RjqVJwhTPQVU+gkVx0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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