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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '92ca5bef33051fa1a2c72ebf315c2dc8c920a19f5aac8fd153ce101becc0001e' 
  AND token = '+uJzXrPQ+orZvjZrqaLPRN2GB/5HZaQljIonhcD092c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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