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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9290eac6bacfb04838ee5578e20010afe9f3d962447b86d123d84254867343ab' 
  AND token = 'bqGWLelNh3djY+m/wNn6RmZ7tHy84kYsSC354AZbZ9o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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