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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9069d52eb6dbc6a73e3a5e7a1c3c8cd3ddd26514c88d183f1581f747913cdc73' 
  AND token = 'yF0b226ihH4Szo0vE6TDmmt00C+MVEXpn8P0QBdGb4A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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