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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0f1cc8e1c7323fad9f0c4bfd43fc8736cdf2aff68754d6c7d1dfc33f98a7a2e6' 
  AND token = 'gTUq7XvFbfUi5qAc8kpDs6L8l4tOvOtIb9Al2bPvoSg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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