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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8087fcab1bb8633b1a77f3a4bf8298a0ab0d201d032f9fe7c18d02685b228dd3' 
  AND token = 'nvEvcCr7o6fWUh6blULycYK8sq+QTK8itI0thhnsdVk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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