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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '65c6df6f057dd318d610bbe7416751bfa9dc4f191f80c72ccbfb97074932e7a0' 
  AND token = 'YTjPQ7oCdk+ReIrdG0PEG2wH37qgTfYila0WbNipUzU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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