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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '41a9b42fba8d957067e4f837b0ce4c3b54ff6faf2b839ea5b89c971fb4dbbd19' 
  AND token = 'eFm7Jfdf77TV8xj6vAlj1yP0m2MxQMIbu/spsteMnlw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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